% Please add the following required packages to your document preamble:
% \usepackage[normalem]{ulem}
% \useunder{\uline}{\ul}{}
\begin{table}[]
	\centering
	\begin{tabular}{llccccccc}
		&                                    & \multicolumn{3}{c}{3-day FOMC window} & \multicolumn{3}{c}{Outside window} &            \\ \cline{3-5} \cline{6-8}
		&                                    & mean          & t-stat      & N       & mean      & t-stat      & N        & Start date \\ \hline
		(1)  & 1y Treasury yield (GSW)            & -0.94***      & (-5.02)     & 839     & -0.01     & (-0.24)     & 7169     & Jun 1989   \\
		(2)  & 2y Treasury yield (GSW)            & -0.86***      & (-4.16)     & 839     & -0.02     & (-0.27)     & 7169     & Jun 1989   \\
		(3)  & 5y Treasury yield (GSW)            & -0.88***      & (-3.88)     & 839     & -0.00     & (-0.06)     & 7169     & Jun 1989   \\
		(4)  & 5y on-the-run Treasury yield (BB)  & -0.80***      & (-3.13)     & 827     & -0.02     & (-0.22)     & 7229     & Jun 1989   \\
		(5)  & 5y inst. forward rate (GSW)        & -0.89***      & (-3.31)     & 839     & 0.01      & (0.14)      & 7169     & Jun 1989   \\
		(6)  & 5y5y Treasury forward rate (GSW)   & -0.73***      & (-2.89)     & 839     & -0.00     & (-0.03)     & 7169     & Jun 1989   \\
		(7)  & 9y inst. forward rate (GSW)        & -0.63**       & (-2.51)     & 839     & -0.01     & (-0.16)     & 7169     & Jun 1989   \\
		(8)  & 10y Treasury yield (GSW)           & -0.81***      & (-3.64)     & 839     & -0.00     & (-0.05)     & 7169     & Jun 1989   \\
		(9)  & 10y on-the-run Treasury yield (BB) & -0.77***      & (-3.27)     & 837     & -0.01     & (-0.14)     & 7286     & Jun 1989   \\
		(10) & 30y Treasury yield (GSW)           & -0.49**       & (-2.40)     & 839     & -0.03     & (-0.45)     & 7169     & Jun 1989   \\
		(11) & 30y on-the-run Treasury yield (BB) & -0.63***      & (-3.12)     & 837     & -0.02     & (-0.27)     & 7286     & Jun 1989   \\ \hline
		(12) & 10y Treasury yield (GSW)           & -0.66**       & (-2.29)     & 555     & 0.00      & (0.02)      & 5062     & Jan 1999   \\
		(13) & 10y TIPS yield (GSW)               & -0.66**       & (-2.58)     & 555     & -0.02     & (-0.35)     & 5063     & Jan 1999   \\
		(14) & 10y on-the-run TIPS yield (BB)     & -0.70***      & (-2.75)     & 577     & -0.00     & (-0.06)     & 5255     & Feb 1997   \\
		(15) & 10y Breakeven yield (GSW)          & 0.00          & (0.02)      & 555     & 0.02      & (0.47)      & 5063     & Jan 1999   \\
		(16) & 10y Inflation swaps (BB)           & 0.13          & (0.56)      & 414     & -0.02     & (-0.39)     & 3978     & Jul 2004   \\
		(17) & 20y TIPS yield (GSW)               & -0.62***      & (-2.84)     & 555     & -0.01     & (-0.22)     & 5063     & Jan 1999   \\
		(18) & 30y on-the-run TIPS yield (BB)     & -0.57**       & (-2.58)     & 563     & -0.01     & (-0.25)     & 5156     & Apr 1998   \\ \hline
	\end{tabular}
\end{table}